The inlay hint api allows to split the hints into parts backed by links, we should make use of this.

https://github.com/rust-analyzer/rust-analyzer/blob/5e8515870674983cce5b945946045bc1e9b80200/crates/rust-analyzer/src/lsp_ext.rs#L273-L283

The main difficulty here is that we currently use HirDisplay to render the display representation of types which doesn't allow introspection into each part. We probably need a proper type visitor api here.